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Patented June 20, I899.

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MANDREL HOLDER. (A li auion filed May 9, 1898.

(No Model.)-

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NITE S FRED T. "REID, OF HARTFORD, CONNECTICUT, ASSIGNOR To THE POPE MANUFACTURING COMPANY, OF SAME PLACE AND PORTLAND, MAINE.

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SPEGIFICATION forming part Of Letters Patent No. 627,444, dateddune 20, 1899.

Application filed May 9, 1898. Serial No. 680,094- (No model.) I

To aZZ whom it may concern.-

Be it known that I, FRED T, REID, a citi? zen of the United States, and a resident of Hartford ,in the county of Hartford and State of; Connecticut, have invented certain new and useful Improvements in Rolling-Mills, of which the following is a full, clear, and exact description, whereby any one skilled in the art can make and use the same.

My invention relates more particularly to the class of mills used for reducing tubes; and the object of my invention is to provide means for ready removal of the mandrel over which the tube is formed and in a manner to avoid disturbing the adjustment of the mandrel with reference to the rolls.

To this end my invention consists in the device as a whole, in the Combination of partscomposing the device, and in the details of construction of parts and their combination, as hereinafter described and more particularly pointed out in the claims.

Referring to the drawings, Figure 1 is a diagram view in section through a set of rolls and in side view of the mandrel-table, illustrating the use of any improvement. Fig. 2 is a detail View in section through the mandrel-table,showinginyimproveddevice. Fig. 3 is a detail view of the lever bearing the pivoted clamp.

In the accompanying drawings the letter n denotes a set of rolls, 0 the end of a mandrel located at one side of the'rolls, and c a billet located on a mandrel d and being reduced in the form of a tube by the action ofthe rolls a,

the mandrel cl being located on the opposite side of the rolls from the mandrel b and supported at one end by a mandrel-table e.

In the operation of reducing a billet in the form of a tube the billet, located on a thendrehis inserted between the rolls and is drawn ad from one mandrel and passes on to another mandrel, this operation being repeated back and forth between the rolls until the billet has acquiredthe proper size. in this operation of forming the tube it is necessary that the mandrels shall be constantly located at a given point with reference to the rolls, this being done-by means of -an adjusting and lock 5o nut located on the outer end of the mandrel.

Prior to my invention when it has been necessary to remove a mandrel for any purpose the nuts are. removed from the end and the mandrel removed by a lengthwise movement rolls is lost, which when the mandrel is again placed in position must be regained at the expense of much time. By the use of my im proved invention the mandrel can be quickly removed or inserted in place, and in such removal and insertion the adjustment is maintained, so that in replacing the mandrel it assumes the position "with reference to the rolls that it had before removal. 7.

The mandrel-table e is preferably formed of metal halving an opening 6 extending across-the table. this opening 6 to the upper surface of the table, and a sleeve f is inserted in this openiug fro m one edge of the table. A clamp-lever 9 extends upward through amopening made depthwise through the table, and aclanip h is pivoted to the upper end of this lever. This clamp is provided with a lug it, formed to rest against the mandrel (Z to hold it in place, a clamp-bolt It being pivoted to the lever and adapted to lie within a bolt-socket in the clamp-lever, the clamp-nut 7L3 on the upper end of the bolt being employed to hold the lever against the mandrel (Z. The clamp his shown as mounted on the table by pivoting to the clamp-lever 9; but it is obvious that this clamp may be mounted on the table in any desired manner and yet come within the scope of my invention, a pivoting to the lever not being essential. An adj listing-screw z is inserted in the opening e in that edge of the table opposite the sleeve f, this adjustingscrew fitting the screw-threaded surface of the opening 6. This adjusting-screw has a hole for the reception of the mandrel d, and a groove 1 extends from the central opening to the outer surface thereof. A groove f is also located in the sleeve f, these grooves f i" being adapted to register with the groove 6 in the upper surface of the table.

It is to be understood that in an operative mill the table provided with the openings e located side by side is also provided with all of the parts herein described located appur- This requires consid- A groove e extends from I tenanttoeach opening. 'lheadjusting-sleeve is provided with means for turning, in the form shown an enlargement i being shaped in the form of a hexagon for the reception of a wrench, and the mandrel d is provided with an adj usting-nut d for locating the mandrel in proper position with relation to the rolls and with a lock-nut d for securing the adjusting-nut in position. A stop 70 is adjustably secured to the table for the purpose of determining the proper position of the adjusting-sleeve 2', the enlargement i of which may rest against this stop when the sleeve is in proper position of adjustment, the proper location of the adj llSliiDg-SCI'BW 1' having been determined by means of the stop is to locate the mandrel d in proper position with relation to the rolls. When it is desired to remove the mandrel for any purpose, the adjusting-screw is turned so that the grooves in the sleeve and table register, the clamp h being loosened for the purpose of allowing such removal. The approximate adjustment of the mandrel with relation to the rolls is elfected by means of the nut d and the final adjustment by means of the adj usting-serew 2'.

I claim as my invention 1. A mandrel-table, a mandrel-socket in the table, a groove extending into said socket, and means located in the socket and having rotary movement to lock the mandrel against lateral displacement.

2. A mandrel-table, a mandrel-socket in the table, a groove extending into said socket whereby a mandrel may be inserted laterally thereof into the socket, and locking means located in the socket and having a groove adapted to register with the groove in the table.

3. A mandrel-table, a mandrel-socket located in the table, a groove opening from said socket to theouter surface of the table, an adjusting-screw located in the socket and having a lengthwise opening for the reception of the mandrel, and a groove extending from the outer surface of the screw to the central opening therein.

4. A mandrel-table, a mandrel-socket located in the table, a groove opening from said socket to the outer surface of the table, an adjusting-screw located in the socket and having an opening for the reception of the mandrel, and means for retaining a mandrel in the socket in the table.

5. A mandrel-table, a mandrel-socket located in the table, a groove extending from said opening to the outer surface of the table, an adjusting-screw located in the mandrel-socket, and a swinging'clamp closing the groove into the socket in the table.

6. A mandrel-table, a' mandrel-socket l0- oated in the table, a groove extending from the socket to the outer surface of the table, a swinging clamp closing the.mouth of the groove, an adjusting-screw located in the mandrel-socket, a mandrel-opening extending lengthwise through the screw and a groove extending from said opcnin g to the outer surface of the screw.

FRED T. REID.

Witnesses CHAS. O. SHAFFER,

HANN E. HART. 

